Syringes. You can get the bigger ones at a pharmacy. I usually use the 3ml or 5ml size for VG and PG. 1ml or 3ml for nic and flavorings. They may or may not sell you 1ml syringes at a pharmacy since they usually come with needles and require a prescription. You don't need the needles anyway.
eta- the bigger syringes can be found by baby or children meds too.
I live in Edinburgh, which is really the Her**n capital of the world. It is pretty easy to walk into most pharmacies and ask for syringes. Get some pretty weird looks though when I say I don't want needles. ;-)